Current + charge Flashcards
1
Q
Current
A
Flow of electric charges
Coulomb per second / Amps
I=Q/t
2
Q
Size of current
A
amount of charges that are flowing past a point per second
3
Q
Direct current
A
Flows in one direction from positive to negative
From battery
4
Q
Alternating current
A
Changes direction
From sockets
5
Q
Measuring current
A
Ammeter connected in series
6
Q
Current in a circuit
A
Current that flows into a junction is equal to the current that flows out of the junction
7
Q
Measuring potential difference
A
Voltmeter connected in parallel
8
Q
Electromotive force (emf)
A
Voltage supplied to a circuit
E.g. Electrical cells - battery
Simple cells
Primary cells - cannot recharge
Secondary cells - can be recharge
9
Q
Batteries connected in series
A
The total voltage is the addition of each of the individuals batteries together
